Ext and Designing HTML-free Client/Server Web-Applications

I am currently writing a series of blog postings, where I express some ideas concerning JavaScript clients in web applications. I am posting here for several reason:

There are a lot of smart people here, and I'd like to hear their take on my ideas and writing.

I use ext extensively, and I'd like to contribute to the community by giving other Ext users input on how one can leverage Ext in client application design (something that comes up often in forums)

I'm praising Ext (very) much in the series The conclusion reads: I highly recommend ExtJS in developing this type of client application. Ext is extremely useful in M(odel), V(iew) and C(ontroller); for this posting we focused on M, where the Ext features support for: